Friction body for friction couplings, brakes, and the like



' FRICTION BODY FOR FRICTION -coU`PL1NG, BRAKES, AND THE LIKE Filed Jan.50,v ldf/ .7n vanter:

Patented Nov. d, lt@

HAN S KATTWNKEL, F COSWIG, GERMANY FRICTION BODY FOR FRICTION COUPLINGS,BRAKES, AND TEE LIKE Application filedY January 30, 1928, Serial No.250,635, and in Germany January 26, 1927.

A main object of invention is the avoidance or the decrease oftheinfluence of the' driving forces ,on the frictional material. Otherobjects of my invention will be apparent from the followingrspecification. Y I n the accompanying drawing two constructional'formsof the friction member ac-.

'cording to my'invention are illustrated. In the drawing j Fig. l is alateral view of a cut-away por- 2o tion of a friction member accordingto my invention,

Fig. 2 is a section taken along'the line II-II of Fig. l, while Fig. 3is a perspective view, partly in seca5 tion, showing a modifiedconstruction of the toothed rim of the friction member according to myinvention.

Referring now more particularly to the drawing, the reference numeral ldesignates 3o the friction member which may be made from a proper massby pressing, said mass con sisting for instance in a mixture of asbestosfibers and a phenolic condensation product. The moulding of the saidmixture is effected, after a toothed rim 2 has been embedded into thefrictional mass, `while the same is still in a plastic condition.

According'to Figs. l and 2 the toothed rin consists essentially of twoannular parts, ofl

which the outer part 3 is of considerably greater thickness than theinner part 4. The toothed rim may, for instance, be turned out of asteel disc. outer part 3 merges into'the inner part 4, i the toothed rimis preferably dovetailed in cross-section, as may beseen especially fromFig. 2. At certain distances notches 5 are worked out of the part 3, asshown in Fig. l, the teeth of the rim being thus produced. The'annularpart 4 may be provided at its At the points where thel internalperiphery with notches 6 and perforations 7 to enhance the adhesionbetween the mass of the friction-disc and the ring 3.

According to Fig. 3 the rim 2a consists of an annularpiece of sheetmetal the outer parts of which are folded around to form the reinforcedteeth 3f. As according to the invention all the teeth'or 'drivingprojections of the friction members are worked out of a single endlessannular piecethe frictional material of the member is not or isnotlconsiderably influenced, by the drivingj'lforces acting in aperipheral direction.A g

In all cases the radial breadth of the metallic rim 2, that is theradial distance between its inner-and outer edges, will be considerablysmaller than the radial distance between the inner and outer edges ofthe annular friction member l. Hence, the weight of the completefriction member including Athe metallic rim will be considerably reducedas compared with the known friction members of the kind described inwhich the metallic supporting rim extends radially to the inner edge ofthe friction member proper.

I claim 1.- A friction element comprising a disc of frictional material,and a metal rim provided with a plurality of driving projections andforming a single endless annular piece which is partly embedded intosaid frictional material, the driving projections of said rim beingformed by folding around the respective portions of the rim.

2. A friction member comprising an annular disc of frictional materialand a single endless annular metallic rim of considerably smaller radialbreadth embedded in said disc and having spaced driving lugs projectingoutwardly beyond the periphery -of said disc, said lugs forming integralportions of said rlm.

3. A friction member comprising an annular disc of frictional materialand a single endless annular metallic rim of considerably smaller radialbreadth embedded in the outer peripheral part of said disc and havingspaced driving lugs projecting outwardly beyond the periphery of saiddisc, said lugs forming integral portions of said rim.

ssi

, 4. A friction member comprising an annular disc of frictional materialand a single endless annular metallic rim of considerably smaller radialbreadth embedded in said disc 5 and having .spaced driving lugsprojecting outwardly beyond the periphery of said disc, said lugsforming integral portions of said rim and being of larger thickness thanthe embedded portion of the rim.

5. A riction'member comprising an annular disc of frictional material,the inner portion of said disc being solid in crosssection, the outerportion having a groove eX- tending around said disc and being open tothe periphery, a metallic rim of smaller breadth than said disc embeddedin said groove and having driving lugs formed integral with it andprojecting outwardly beyond. the periphery of said disc. A

6. A friction member comprising a single annular disc of frictionalmaterial and a single annular metallicI rim of considerably smallerradial breadth embedded in said disc and having integral therewithspaced driving lugs projecting outwardly beyond the peri hery of saiddisc.

n testimony whereof' I aiix my signature.

- HANS l KATTWINKEL.

